diff --git a/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue b/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue
index d0d34308..7c763f07 100755
--- a/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue
+++ b/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue
@@ -314,6 +314,7 @@
                 >
                   <template #title>
                     <span class="cat-title">{{ cat.categoryName }}</span>
+                    <span v-if="categoryLoadingSet.has(cat.typeId)" class="loading-dot"></span>
                   </template>
                   <div
                     v-for="item in cat.items"
@@ -329,6 +330,9 @@
                     </el-checkbox>
                     <span class="item-price">¥{{ item.price }}/{{ item.unit || "次" }}</span>
                   </div>
+                  <div v-if="categoryLoadingSet.has(cat.typeId)" class="category-loading-hint">
+                    加载中...
+                  </div>
                 </el-collapse-item>
               </el-collapse>
             </div>
@@ -517,6 +521,7 @@ const rules = {
 const categoryList = ref([]);   // 原始分类+项目数据
 const dictSearchKey = ref('');
 const activeNames = ref('');    // 当前展开的折叠项
+const categoryLoadingSet = ref(new Set());  // Bug #500: 正在加载方法的分类集合
 
 const allMethods = ref([]);
 
@@ -632,16 +637,21 @@ const availableMethods = computed(() => {
 
 // 当可选方法列表改变时，如果当前选中的方法不在新列表中，则清空
 // #428: 分类展开时联动加载检查方法
+// Bug #500: 使用 categoryLoadingSet 替代 dictLoading，避免切换分类时整个区域闪烁
 async function handleCategoryExpand(cat) {
   if (!cat || !cat.typeName) return;
-  
+
+  // 如果已加载过或正在加载中，跳过
+  if ((cat.methods && cat.methods.length > 0) || categoryLoadingSet.value.has(cat.typeId)) return;
+
+  categoryLoadingSet.value.add(cat.typeId);
   try {
     const res = await searchCheckMethod({ checkType: cat.typeName });
     let data = res?.data?.data || res?.data || res?.rows || res;
     if (!Array.isArray(data) && res?.data && Array.isArray(res.data.data)) {
       data = res.data.data;
     }
-    
+
     if (Array.isArray(data) && data.length > 0) {
       cat.methods = data.map(m => ({
         id: m.id,
@@ -655,14 +665,16 @@ async function handleCategoryExpand(cat) {
     }
   } catch (err) {
     console.error('加载分类检查方法失败', err);
+  } finally {
+    categoryLoadingSet.value.delete(cat.typeId);
   }
 }
-async function handleCollapseChange(activeName) {
-  // 当折叠面板展开时，加载对应分类的检查方法
+// Bug #500: 改为非 async 函数，避免 el-collapse 的 @change 等待异步完成导致抖动
+function handleCollapseChange(activeName) {
   if (activeName) {
     const cat = filteredCategoryList.value.find(c => c.typeId == activeName);
     if (cat && (!cat.methods || cat.methods.length === 0)) {
-      await handleCategoryExpand(cat);
+      handleCategoryExpand(cat);  // 异步加载，不 await
     }
   }
 }
@@ -1309,6 +1321,20 @@ defineExpose({ getList });
   font-weight: 500;
   color: #303133;
 }
+/* Bug #500: 分类加载中的小圆点动画 */
+.loading-dot {
+  display: inline-block;
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: #409eff;
+  margin-left: 6px;
+  animation: dotPulse 1s ease-in-out infinite;
+}
+@keyframes dotPulse {
+  0%, 100% { opacity: 0.3; transform: scale(0.8); }
+  50% { opacity: 1; transform: scale(1.2); }
+}
 .item-row {
   display: flex;
   align-items: center;
@@ -1448,10 +1474,24 @@ defineExpose({ getList });
   height: auto;
   line-height: 1.5;
 }
+/* Bug #500: 折叠内容添加平滑过渡动画，避免切换时高度跳变 */
 :deep(.el-collapse-item__content) {
   padding-bottom: 4px;
+  transition: all 0.3s ease;
 }
+/* Bug #500: 折叠面板展开/收起动画使用 will-change 优化性能 */
 :deep(.el-collapse-item__wrap) {
   border: none;
+  will-change: height;
+}
+:deep(.el-collapse-item) {
+  transition: margin 0.2s ease;
+}
+/* Bug #500: 分类加载中提示样式 */
+.category-loading-hint {
+  color: #909399;
+  font-size: 12px;
+  text-align: center;
+  padding: 8px 0;
 }
 </style>